CN103605155B - High precision wireless MANET seismic acquisition unit - Google Patents
High precision wireless MANET seismic acquisition unit Download PDFInfo
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- CN103605155B CN103605155B CN201310643983.6A CN201310643983A CN103605155B CN 103605155 B CN103605155 B CN 103605155B CN 201310643983 A CN201310643983 A CN 201310643983A CN 103605155 B CN103605155 B CN 103605155B
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Abstract
The present invention is a kind of high precision wireless MANET seismic acquisition unit, and it comprises: as the main control unit of control center, and described main control unit is connected with external wireless communication equipment by coupled wireless networking communications unit; For the seismic wave sensors of locality seismic wave data message, the signal output part of described seismic wave sensors connects main control unit by the signal processing unit for carrying out filter amplifying processing to seismic event simulating signal; For the power supply unit of powering, described power supply unit connects main control unit, signal processing unit and wireless networking communications unit respectively.Structure of the present invention is simple, eliminates the loaded down with trivial details of wiring, and the signal finally obtained with season is more accurate, and the analysis for staff provides conveniently.The present invention is applicable to earth ' s internal structure research, engineering exploration and the field such as detection, geological hazards prediction and detects seismic event.
Description
Technical field
The invention belongs to seismic event and gather field, particularly relate to the seismic event collection of wireless self-networking, specifically a kind of high precision wireless MANET seismic acquisition unit.
Background technology
Earthquake exploration method is the important method that oil, sky hot gas or mineral deposit etc. construct about the exploration subterranean layer often used in Exploration Domain, and seismic survey is generally realized by seismic instrument.In recent years along with the expansion of seismic survey scale, seismic instrument field construction number of channels is more and more, construction ground surface condition becomes increasingly complex, operating efficiency requires more and more higher.And adopt cable to connect between the collection Dao Yu road of traditional seismic instrument, so need extensive work personnel on site to connect up before construction, also need take-up at the end of measurement, work efficiency is lower; When run into expressway, railway and water system time, the wiring of wired seismic instrument just becomes a difficult problem.Therefore, when complicated landform carries out seismic survey, need a kind of seismic acquisition unit of Wireless Data Transmission gather data and transmit, but wireless seismic acquistion device of the prior art is fewer, precision comparison is low simultaneously, can not meet the demand of analysis to the acquisition and processing of data.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides a kind of high precision wireless MANET seismic acquisition unit, without the need to loaded down with trivial details wiring, just can adapt to multiple landform demand, simultaneously high with the data precision of its collection, reliable data can be provided for subsequent analysis.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of high precision wireless MANET seismic acquisition unit, comprises
As the main control unit of control center, it is connected with external wireless communication equipment by coupled wireless networking communications unit;
For the seismic wave sensors of locality seismic wave data message, its signal output part connects main control unit by the signal processing unit for carrying out filter amplifying processing to seismic event simulating signal;
For the power supply unit of powering, it connects main control unit, signal processing unit respectively, and wireless networking communications unit.
As limitation of the invention: described high precision wireless MANET seismic acquisition unit also comprises the GPS time service unit being controlled and then control main control unit energising by outer remote and run, and described GPS time service unit is located between power supply unit and main control unit.
Limit as to another kind of the present invention: described signal processing unit comprises the filtration module for carrying out filtering process to the simulating signal gathered, the signal output part of described filtration module connects the signal input part be used for the floating-point amplifier module that simulating signal is amplified, and the signal output part of described floating-point amplifier module connects main control unit by the A/D modular converter for simulating signal being converted to digital signal.
As limitation of the invention further: described filtration module comprises the pre-amplification circuit for carrying out amplifying process to simulating signal, the signal input part of described pre-amplification circuit connects seismic wave sensors, its signal output part connects the signal input part being used for filtering circuit simulating signal being carried out to removal of impurities, and the signal output part of described filtering circuit connects the signal input part being used for buffering delay circuit simulating signal being carried out to buffered;
Described floating-point amplifier module comprises for carrying out amplitude judgement to simulating signal and can selecting the amplitude anticipation circuit to the multiple that simulating signal is amplified; The signal input part of described amplitude anticipation circuit receives the simulating signal of buffering time delay road output, the floating-point amplifier circuit of signal output part control linkage alterable enlargement factor; The input end of described floating-point amplifier circuit receives the simulating signal of buffering delay circuit output, and signal output part connects follow-up high-precision A/D change-over circuit
Limit further again as to of the present invention: described pre-amplification circuit comprises the reverse spike voltage protection circuit for the protection of reverse spike voltage, the signal input part of described reverse spike voltage protection circuit connects seismic wave sensors, and its signal output part connects the amplifying circuit being used for amplifying simulating signal;
Described filtering circuit comprises the notch filter circuit that the signal after to pre-amplification circuit amplification carries out further removal of impurities; The signal input part of described notch filter circuit connects the signal output part of amplifying circuit, and its signal output part connects the signal input part being used for low-pass filter circuit simulating signal being carried out to low-pass filtering; The signal output part of described low-pass filter circuit connects the signal input part being used for circuit of high pass filter simulating signal being carried out to high-pass filtering;
Described buffering delay circuit comprises the input buffer circuit for carrying out buffered to simulating signal; The signal input part of described input buffer circuit connects the signal output part of circuit of high pass filter, and its signal output part connects the signal input part being used for time delay input buffer circuit simulating signal being carried out to delay process.
Further limit as to of the present invention:
Described pre-amplification circuit is also provided with two for carrying out the clear and coherent self-test signal input end detected to data acquisition channel, the positive pole of described self-test signal input end is connected with the main control unit of seismic event collector when carrying out self-inspection, and negative pole is ground connection when carrying out self-inspection; The selected on-off circuit that one of gating detection signal or self-test signal carry out inputting is provided with between reverse spike voltage protection circuit and amplifying circuit.
The signal input part of described amplitude anticipation circuit connects the signal output part of buffering delay circuit, comprises the main control unit as control center, is provided with A/D translation function in described main control unit, and be provided with the reference value of at least two digital signals;
Described floating-point amplifier circuit comprise to signal do not do to amplify change without amplifying circuit, and at least one-level amplifying circuit that signal is amplified; The described signal input part without amplifying circuit and amplifying circuit is under the control of amplitude anticipation circuit, select the simulating signal that a reception seismic event device acquisition buffer delay circuit exports, under the described signal output part without amplifying circuit and amplifying circuit is connected to the control of amplitude anticipation circuit, to the signal input part carrying out the MUX of gating output without amplifying circuit and amplifying circuit; The signal output part of MUX connects follow-up high-precision A/D change-over circuit.
Limit as to the darkest step of the present invention: the main control unit of described amplitude anticipation circuit is the main control unit in seismic acquisition unit;
Described amplifying circuit comprises one-level amplifying circuit, second amplifying circuit, three-stage amplifier,
The signal input part of described one-level amplifying circuit receives the simulating signal of buffering delay circuit output under the control of amplitude anticipation circuit, and signal output part connects one in second amplifying circuit or MUX under the control of floating-point anticipation circuit,
One in three-stage amplifier or MUX is connected under the control that the signal output part of described second amplifying circuit is simulated in floating-point anticipation,
The signal output part of described three-stage amplifier connects MUX.
Owing to have employed above technical scheme, the present invention can reach following technique effect:
(1) the present invention is provided with wireless networking communications unit, main control unit can be communicated with the wireless communication unit of outside by this communication unit, achieve the Wireless transceiver of information, eliminate the loaded down with trivial details of wiring, ensure that the present invention can be adapted to any landform and carry out seismic event collection;
(2) the present invention is also provided with GPS time service unit, and it under the Long-distance Control of control terminal, can be opened seismic acquisition unit and carry out information acquisition, achieve the real-time of seismic acquisition unit exploration at any time;
(3) signal processing unit comprises filtration module, floating-point amplifier module, high-precision A/D modulus of conversion module, the process that filtering, amplification and A/D change can be carried out to the simulating signal gathered, wherein filtration module includes pre-amplification circuit, filtering circuit and buffering delay circuit, therefore can carry out sufficient removal of impurities, filtering to the simulating signal collected, make the processing signals precision obtained higher; And floating-point amplifier module comprises amplitude anticipation circuit and can select the floating-point amplifier circuit of enlargement factor, can compare to the signal after filtration module process and the reference value prestored, controlling floating-point amplifier circuit after comparison selects corresponding enlargement factor to amplify simulating signal, ensure that the signal obtained meets the scope of application of high-precision A/D modular converter, make the signal finally obtained more accurate.
In sum, structure of the present invention is simple, eliminates the loaded down with trivial details of wiring, and the signal finally obtained with season is more accurate, and the analysis for staff provides conveniently.
The present invention is applicable to earth ' s internal structure research, engineering exploration and the field such as detection, geological hazards prediction and detects seismic event.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of pre-amplification circuit 311 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 3 is the circuit theory diagrams of filtering circuit 312 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 4 is the circuit theory diagrams cushioning delay circuit 313 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 5 is the theory diagram of the floating-point amplifier module 32 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 6 is the circuit theory diagrams of floating-point amplifier circuit U 3 in the module of floating-point amplifier shown in Fig. 5 32.
In figure: 1-main control unit, 2-seismic wave sensors, 3-signal processing unit, 31-filtration module, 311-pre-amplification circuit, 312-filtering circuit, 313-buffering delay circuit, 32-floating-point amplifier module, 33-A/D modular converter, 4-wireless networking communications unit, 5-power supply unit, 6-GPS time service unit, U1-eight homophase three-state buffer, U2-amplitude anticipation circuit, U3-floating-point amplifier circuit, U4-MUX.
Embodiment
a kind of high precision wireless MANET of embodiment seismic acquisition unit
Present embodiments provide a kind of high precision wireless MANET seismic acquisition unit, its structural reference Fig. 1, it comprises:
(1) main control unit 1
Main control unit 1 is control center, and the present embodiment adopts embedded control chip STM32F103RBT6 chip as main control unit 1.Described main control unit 1 is connected with external wireless communication equipment by coupled wireless networking communications unit 4.
Wireless networking communications unit 4 in the present embodiment adopts CC2530 communication chip of the prior art, and the external circuit of chip is circuit conventional in prior art.
(2) seismic wave sensors 2
Seismic wave sensors 2 for the data message of locality seismic wave, and sends the information collected to main control unit 1.
Seismic wave sensors 2 in the present embodiment adopts the seismic event collector of 8340 type seismic sensors of the prior art, and its signal output part connects main control unit 1 by the signal processing unit 3 for carrying out filter amplifying processing to seismic event simulating signal.
Wherein, described signal processing unit 3 comprises for carrying out the filtration module 31 of filtering process, the floating-point amplifier module 32 for amplifying simulating signal to the simulating signal gathered, and for simulating signal being converted to the A/D modular converter 33 of digital signal, wherein the signal input part of filtration module 31 receives the analog information that seismic wave sensors 2 gathers, its signal output part connects the signal input part of floating-point amplifier module 32, and the signal output part of floating-point amplifier module 32 connects main control unit 1 by A/D modular converter 33.
And filtration module 31 comprises:
(1) pre-amplification circuit 311
Pre-amplification circuit 311 carries out amplification process for the simulating signal collected seismic wave sensors 2, and its signal input part connects seismic wave sensors 2.Specifically as shown in Figure 2, comprising:
1. reverse spike voltage protection circuit
Reverse spike voltage protection circuit is for the protection of reverse spike voltage; described reverse spike voltage protection circuit comprises the first bi-directional voltage stabilizing pipe D1 and the second bi-directional voltage stabilizing pipe D2, and the series circuit that described first bi-directional voltage stabilizing pipe D1 and the second bi-directional voltage stabilizing pipe D2 are formed is connected externally seismic wave collector by two signal input part S1 and S2 of pre-amplification circuit 311.Before the series circuit of the first bi-directional voltage stabilizing diode D1 and the second bi-directional voltage stabilizing diode D2, be parallel with the first capacitor C1, be also parallel with the series circuit of the second capacitor C2 and the 3rd capacitor C3 simultaneously.
2. amplifying circuit
Amplifying circuit is used for carrying out amplification process to the simulating signal that seismic wave sensors 2 collects, as shown in Figure 2, described amplifying circuit comprises the first operational amplifier UA1, the second operational amplifier UA2, the 3rd operational amplifier UA3, and the resistance of its periphery, electric capacity.
In the present embodiment, the first operational amplifier UA1 and the second operational amplifier UA2 all adopts operational amplifier OP777 of the prior art, and the 3rd operational amplifier UA3 then adopts operational amplifier OP07 of the prior art.
Wherein the in-phase input end of the first operational amplifier UA1 connects the first signal input part S1 of pre-amplification circuit 311 by the first resistance R1, inverting input is connected the inverting input of the 3rd operational amplifier UA3 by the 9th resistance R9 with the series circuit of the tenth resistance R10, output terminal connects the intermediate node of the series circuit of the 9th resistance R9 and the tenth resistance R10.The in-phase input end of the second operational amplifier UA2 connects the secondary signal input end S2 of pre-amplification circuit 311 by the second resistance R2, inverting input is connected the in-phase input end of the 3rd operational amplifier UA3 by the 11 resistance R11 with the series circuit of the 12 resistance R12, output terminal connects the intermediate node of the series circuit of the 11 resistance R11 and the 12 resistance R12.The output terminal of described 3rd operational amplifier UA3 is as the output terminal of pre-amplification circuit 311, and the simulating signal exported after amplifying is designated as CS1.
3. self-test signal input end
Whether self-test signal input end is clear and coherent for detecting data acquisition channel, the present embodiment is provided with two self-test signal input end TEST+ and TEST-, the positive pole TEST+ of described self-test signal input end is connected with the main control unit 1 of externally seismic wave collector when carrying out self-inspection, and negative pole TEST-is ground connection when carrying out self-inspection.Meanwhile, self-test signal input end is also connected with follow-up amplifying circuit.
And in order to make self-test signal and the seismic signal detected distinguish, the present embodiment is also provided with selected on-off circuit between reverse spike voltage protection circuit and amplifying circuit; In order to information transmission is convenient, the present embodiment is also provided with eight homophase three-state buffer U1 between self-test signal input end and the main control unit 1 of seismic event collector, and eight homophase three-state buffer U1 in the present embodiment adopt 74HC244 chip of the prior art.
Described selected on-off circuit can be input in pre-amplification circuit 311 by the signal one of in gating detection signal or self-test signal.Specifically as shown in Figure 2, described selected on-off circuit comprises the first linked switch K1 and the second linked switch K2, first linked switch K1 and the second linked switch K2 all selects programmed switch chip DG303 of the prior art, has moving contact and four stationary contacts of two interlocks.Described first linked switch K1 is connected in parallel on after the reverse spike protection circuit that the first bi-directional voltage stabilizing pipe D1 and the second bi-directional voltage stabilizing pipe D2 forms, first moving contact of the first linked switch K1 connects the first input end S1 of pre-amplification circuit 311, second moving contact connects the second input end S2 of pre-amplification circuit 311, first stationary contact is connected the 3rd stationary contact of self by the 3rd resistance R3 with the series circuit of the 5th resistance R5, before the series circuit of the 3rd resistance R3 and the 5th resistance R5, be parallel with the 4th resistance R4 simultaneously, second stationary contact connects the positive pole TEST+ of self-test signal input end, 4th stationary contact connects the negative pole TEST-of self-test signal input end.The second described linked switch K2 is serially connected in the first resistance R1, between the second resistance R2 and amplifying circuit, wherein first stationary contact of the second linked switch K2 connects the first resistance R1; Second stationary contact connects the positive pole TEST+ of self-test signal input end, simultaneously the second stationary contact also connect eight homophase three-state buffer U1 with 14 pin Y3; 3rd stationary contact connects the second resistance R2, and the 4th stationary contact connects the negative pole TEST-of self-test signal input end, and the 4th stationary contact also connects eight homophase three-state buffer U1 the 12 pin Y4 simultaneously; First moving contact connects the in-phase input end of the first operational amplifier UA1; Second moving contact connects the in-phase input end of the second operational amplifier UA2.
And the signal input part of eight homophase three-state buffer U1 connects the main control unit 1 of seismic event collector, 16 pin Y2 is connected amplifying circuit with the 18 pin Y1 by the 3rd K switch 3,9th pin Y5 connects the control end of the second linked switch K2, and the 7th pin Y6 connects the control end of the first linked switch K1.
In addition, in pre-amplification circuit 311, two shielded signal end V1+ and V1-are also provided with in the present embodiment, for shielding the interference of outer signals, described two shielded signal end V1+ and V1-connect the in-phase input end of the 3rd operational amplifier UA3 jointly by the 13 resistance R13.
(2) filtering circuit 312
Filtering circuit 312 is for carrying out filtering process to the simulating signal collected, and concrete structure as shown in Figure 3, comprising:
1. notch filter circuit
Notch filter circuit is used for the simulating signal after to pre-amplification circuit 311 amplification and carries out removal of impurities, described notch filter circuit comprises resistance, the capacitor of four-operational amplifier UA4, the 5th operational amplifier UA5 and periphery, and in the present embodiment, four-operational amplifier UA4 and the 5th operational amplifier UA5 all adopts operational amplifier OP27.Wherein the in-phase input end of four-operational amplifier UA4 is connected by the 15 resistance R15 the simulating signal CS1 that pre-amplification circuit 311 exports with the series circuit of the 16 resistance R16, the series circuit that the 5th capacitor C5 and the 6th capacitor C6 is formed is parallel with at the two ends of the 15 resistance R15 and the 16 resistance R16 series circuit, simultaneously at the intermediate node of the series circuit of the 15 resistance R15 and the 16 resistance R16, and the 5th is serially connected with the series circuit that the 4th capacitor C4 and the 17 resistance R17 forms between the capacitor C5 intermediate node of circuit of connecting with the 6th capacitor C6.The inverting input of four-operational amplifier UA4 is connected with the output terminal of self, and its output terminal is by the first potentiometer RP1 ground connection.
And the in-phase input end of the 5th operational amplifier UA5 connects the intermediate node of the 4th capacitor C4 and the 17 resistance R17 series circuit, inverting input passes through the first potentiometer RP1 ground connection, the in-phase input end of output terminal connection self.
2. low-pass filter circuit
Low-pass filter circuit is used for carrying out low-pass filtering to the simulating signal after trapper removal of impurities, its concrete structure as shown in Figure 3, comprise the resistance of the 6th operational amplifier UA6 and periphery thereof, capacitor, wherein the 6th operational amplifier UA6 adopts operational amplifier OP07 of the prior art, and the 6th operational amplifier UA6 in-phase input end is connected the output terminal of four-operational amplifier UA4 with the series circuit of the 19 resistance R19 by the 18 resistance R18, its inverting input is by the 20 resistance R20 ground connection, also connected the output terminal of self by the 21 resistance R21 simultaneously.
3. circuit of high pass filter
Circuit of high pass filter is used for carrying out high-pass filtering to the simulating signal after low-pass filter circuit removal of impurities, and its concrete structure as shown in Figure 3, comprises resistance, the capacitor of the 7th operational amplifier UA7 and periphery thereof.In the present embodiment, the 7th operational amplifier UA7 adopts operational amplifier OP4177 of the prior art, wherein the in-phase input end of the 7th operational amplifier UA7 connects the output terminal of the 6th operational amplifier UA6 by the 7th capacitor C7, simultaneously also by the 22 resistance R22 ground connection; Its inverting input is connected the output terminal of self by the 23 resistance R23 with the parallel circuit of the 8th capacitor C8.
(3) delay circuit 313 is cushioned
Buffering delay circuit 313 is for carrying out time delay buffered to the simulating signal that should be filtering circuit 312 output, and its concrete structure as shown in Figure 4, comprising:
1. input buffer circuit
The simulating signal that input buffer circuit is used for filtering circuit 312 exports carries out buffered, described input buffer circuit comprises input the 8th operational amplifier UA8, 9th operational amplifier UA9, tenth operational amplifier UA10, and the resistance of periphery, capacitor, 8th operational amplifier UA8 in the present embodiment, 9th operational amplifier UA9, tenth operational amplifier UA10 all adopts operational amplifier LM741 in prior art, wherein the in-phase input end of the 8th operational amplifier UA8 is connected the output terminal of the 7th operational amplifier UA7 with the series circuit that the 9th capacitor C9 is formed by the 24 resistance R24, simultaneously also by the parallel circuit ground connection of the tenth capacitor C10 and the 25 resistance R25, the output terminal of its inverting input connection self.
The in-phase input end ground connection of described 9th operational amplifier UA9, inverting input is by the series circuit ground connection of the 26 resistance R26 and the 27 resistance R27, also connected the output terminal of self by the 11 capacitor C11, the output terminal of described 9th operational amplifier UA9 connects the intermediate node of the 9th capacitor C9 and the 24 resistance R24 by the 28 resistance R28 simultaneously.
The in-phase input end ground connection of described tenth operational amplifier UA10, inverting input, by the series circuit ground connection of the 29 resistance R29 and the 30 resistance R30, also connects the output terminal of self simultaneously by the 12 capacitor C12.
2. time delay buffer circuits
Time delay buffer circuits is used for processing the simulating signal after input buffer circuit process, comprise the 11 operational amplifier UA11, and the resistance of periphery, capacitor, the 11 operational amplifier UA11 in enforcement adopts operational amplifier LM324 of the prior art.Wherein the in-phase input end of the 11 operational amplifier UA11 connects the output terminal of the 8th operational amplifier UA8 by the 31 resistance R31, simultaneously also by the 13 capacitor C13 ground connection; Described inverting input connects the output terminal of the 8th operational amplifier UA8 by the 32 resistance R32, is also connected the output terminal of self with the parallel circuit of the 14 capacitor C14 by the 33 resistance R33 simultaneously; Described 11 operational amplifier UA11 also connects the output terminal of the tenth operational amplifier UA10 by the 34 resistance R34.
Described floating-point amplifier module 32 comprises as shown in Figure 5:
(1) amplitude anticipation circuit U 2
Amplitude anticipation circuit U 2 is carried out amplitude judgement for the simulating signal exported filtration module 31 and can be selected the multiple that amplifies simulating signal.
Amplitude anticipation circuit U 2 comprises main control unit, and main control unit is as control center, and inside is provided with 12 A/D translation functions, and storage inside has the reference value of at least two digital signals simultaneously, and alignment programs.
In order to structure is simple, in the present embodiment, directly adopt the main control unit 1 in seismic event collector as the control center of amplitude anticipation circuit U 2.
(2) floating-point amplifier circuit U 3
The input end of floating-point amplifier circuit U 3 accepts filter the simulating signal that module 31 exports, under the control of amplitude anticipation circuit, corresponding enlargement factor is selected to carry out amplification process to this simulating signal, signal after process exports to follow-up high-precision A/D change-over circuit by MUX U4, wherein high-precision A/D change-over circuit adopts 24 AD of the prior art to amplify change-over circuit, and MUX U4 adopts existing DG509 chip to realize.
Floating-point amplifier circuit U 3 structure as shown in Figure 6, specifically comprises:
1. without amplifying circuit
Do not do to amplify without the simulating signal of amplifying circuit to input and change, namely simulating signal does not change amplitude size, carries out follow-up A/D conversion process according to original amplitude.
Comprise the 12 operational amplifier UA12 without amplifying circuit in the present embodiment, the 12 operational amplifier UA12 adopts existing operational amplifier OP777.
The in-phase input end of the 12 operational amplifier UA12 connects one of them stationary contact of the 8th selector switch K8, another stationary contact of 8th selector switch K8 connects a stationary contact of the 5th selector switch K5, and the moving contact of the 8th selector switch K8 connects the simulating signal CS3 after cushioning delay circuit process; The inverting input of the 12 operational amplifier UA12 connects the output terminal of self, and its output terminal connects the 4th signal input part IN4 of MUX U4.
2. amplifying circuit
Amplifying circuit is used for carrying out amplification process to the simulating signal after Acquisition Circuit acquisition process, be at least provided with one-level amplifying circuit in use, and amplifying circuit also receives the simulating signal CS3 cushioning delay circuit and export by the 8th selector switch K8.
Situation according to locality seismic wave in the present embodiment is provided with three-stage amplifier altogether: one-level amplifying circuit, second amplifying circuit and three-stage amplifier.
One-level amplifying circuit comprises the 13 operational amplifier UA13, second amplifying circuit comprises the tenth four-operational amplifier UA14, three-stage amplifier comprises the tenth the May 4th operational amplifier UA15, and the 13 operational amplifier UA13, the tenth four-operational amplifier UA14, the 15 operational amplifier UA15 all adopt operational amplifier OP07 of the prior art.
The in-phase input end of the 13 operational amplifier UA13 connects the moving contact of the 5th selector switch K5 by the 35 resistance R35, and the inverting input of the 13 operational amplifier UA13 is connected the output terminal of self by the 15 capacitor C15 with the parallel circuit of the 36 resistance R36, simultaneously also by the 37 resistance R37 ground connection, its output terminal connects the 3rd signal input part IN3 of MUX U4, the output terminal of the 13 operational amplifier UA13 also connects a stationary contact of the 6th gauge tap K6 simultaneously, and the moving contact of the 6th gauge tap K6 connects the in-phase input end of the tenth four-operational amplifier UA14 by the 38 resistance R38, and the inverting input of the tenth four-operational amplifier UA14 is connected the output terminal of self by the 39 resistance R39 with the parallel circuit of the 16 capacitor C16, simultaneously also by the 40 resistance R40 ground connection, its output terminal connects the secondary signal input end IN2 of MUX U4, also connect a stationary contact of the 7th selector switch K7 simultaneously, the moving contact of the 7th selector switch K7 connects the in-phase input end of the 15 operational amplifier UA15, and the moving contact of the 7th selector switch K7 also selects one of them stationary contact to connect under the control of main control unit 1, and the inverting input of the 15 operational amplifier UA15 is connected the output terminal of self by the 41 resistance R41 with the parallel circuit of the 17 capacitor C17, simultaneously also by the 42 resistance R42 ground connection, its output terminal connects the first signal output part IN1 of MUX U4.
The 5th above-mentioned selector switch K5, the 6th selector switch K6, the 7th selector switch K7, the 8th selector switch K8 all connect at order moving contact and one of them stationary contact of the control of main control unit 1.
In addition, MUX U4 is also subject to the control of main control unit 1, an input end conducting in gating four signal input parts.And the signal CS4 after the signal output part output amplification process of MUX U4 carries out A/D conversion to the high-precision A of next stage/D change-over circuit.
(3) power supply unit
Power supply unit is used for power supply, and it connects main control unit 1, signal processing unit 3 respectively, and wireless networking communications unit 4.
(4) GPS time service unit
GPS time service unit is controlled and then controls main control unit 1 timing energization and runs by outer remote, described GPS time service unit is located between power supply unit and main control unit 1.GPS time service unit in the present embodiment adopts the GPS module with the UBLOXNEO6M model of built-in ceramic antenna in prior art.
The principle of work of the present embodiment is: when seismic wave sensors 2 collects simulating signal, first send this simulating signal to signal processing unit 3 to process, the process of process is the shell the first shielded signal end V+ being connected seismic event collector, secondary shielding signal end V-ground connection, then first moving contact of the first linked switch K1 is connected the first stationary contact, second moving contact connects the 3rd stationary contact, and first moving contact of the second linked switch K2 connects the first stationary contact, second moving contact connects the 3rd stationary contact, the Simulating Seismic Wave signal collected is by after reverse spike protection circuit, amplify through operational amplification circuit, simulating signal CS1 after amplification passes to filtering circuit 312, successively through notch filter circuit, low-pass filter circuit, circuit of high pass filter carries out removal of impurities, simulating signal CS2 after removal of impurities is more successively through input buffer circuit and the time delay buffer circuits of buffering delay circuit 313, the simulating signal CS3 that final output is comparatively pure.
Described simulating signal CS3 is the simulating signal that degree of purity is higher, this simulating signal inputs in floating-point amplifier module 32 afterwards, in floating-point amplifier module 32, simulating signal CS3 can through following process: simulating signal CS3 inputs to main control unit 1 by PC0 pin, main control unit 1 can carry out A/D conversion to this simulating signal, what adopt due to the present embodiment is the main control unit 1 of seismic event collector self, therefore, this main control unit 1 tool has plenty of 12 A/D conversions, signal after conversion becomes digital signal, the reference value stored in this signal and main control unit 1 is compared, simultaneously owing to being provided with three-stage amplifier in the present embodiment, therefore in main control unit 1, four reference values are stored, first signal value after being changed by A/D compares with the maximum reference value existed, if the signal value after conversion is not less than the maximum reference value of storage, then this simulating signal is without the need to amplifying, directly can export to high-precision A/D change-over circuit, therefore, 6th control pin PC6 of main control unit 1 sends control signal, the 8th selector switch K8 is made to connect the 12 operational amplifier UA12, simulating signal CS3 is made directly to export to MUX U4 by the 12 operational amplifier UA12, simultaneously the first control pin PC1 of main control unit 1 and the second control pin PC2 controls MUX U4 gating the 4th signal input part IN4, the signal output part OUT of MUX U4 is finally had to output signal CS4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than the maximum reference value of storage, then second largest reference value of this signal value and storage is compared, if this signal value is not less than second largest reference value of storage, this simulating signal only need be carried out one-level and be amplified, therefore, 6th control pin PC6 of main control unit 1, 5th control pin PC5, 4th control pin PC4, 3rd control pin PC3 sends control signal respectively, the 8th selector switch K8 is made to connect the 5th selector switch K5, and control the 5th selector switch K5 connection the 13 operational amplifier UA13, 6th selector switch K6 disconnects the tenth four-operational amplifier UA14, MUX U4 is directly exported to after making simulating signal CS3 be amplified by the one-level of the 13 operational amplifier UA13, simultaneously the first control pin PC1 of main control unit 1 and the second control pin PC2 controls MUX U4 gating the 3rd signal input part IN3, the signal output part OUT of MUX U4 is finally had to output signal CS4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than second largest reference value of storage, then the third-largest reference value of this signal value and storage is compared, if this signal value is not less than the third-largest reference value of storage, this simulating signal only need be carried out two-stage and be amplified, therefore, 6th control pin PC6 of main control unit 1, 5th control pin PC5, 4th control pin PC4, 3rd control pin PC3 sends control signal respectively, the 8th selector switch K8 is made to connect the 5th selector switch K5, and control the 5th selector switch K5 connection the 13 operational amplifier UA13, 6th selector switch K6 connects the tenth four-operational amplifier UA14, and the 7th selector switch K7 disconnects the 15 operational amplifier UA15, after making simulating signal CS3 be amplified by the one-level of the 13 operational amplifier UA13, secondary again through the tenth four-operational amplifier UA14 amplifies, just export to MUX U4, simultaneously the first control pin PC1 of main control unit 1 and the second control pin PC2 controls MUX U4 gating secondary signal input end IN2, the signal output part OUT of MUX U4 is finally had to output signal CS4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than the third-largest reference value of storage, then the minimum reference value of this signal value and storage is compared, if this signal value is not less than second largest reference value of storage, this simulating signal needs to carry out three grades of amplifications, therefore, 6th control pin PC6 of main control unit 1, 5th control pin PC5, 4th control pin PC4, 3rd control pin PC3 sends control signal respectively, the 8th selector switch K8 is made to connect the 5th selector switch K5, and control the 5th selector switch K5 connection the 13 operational amplifier UA13, 6th selector switch K6 connects the tenth four-operational amplifier UA14, 7th selector switch K7 connects the 15 operational amplifier UA15 simultaneously, simulating signal CS3 is made to be amplified by the one-level of the 13 operational amplifier UA13 successively, the secondary of the tenth four-operational amplifier UA14 amplifies, and the 15 three grades of operational amplifier UA15 amplify after, export to MUX U4, simultaneously the first control pin PC1 of main control unit 1 and the second control pin PC2 controls MUX U4 gating first signal input part IN1, the signal output part OUT of MUX U4 is finally had to output signal CS4 to follow-up high-precision A/D change-over circuit.
In addition, the present embodiment needed to carry out smoothness detection to whole data acquisition channel before to analog signal processing, first, the sinusoidal signal that main control unit 1 produces a fixed frequency and amplitude delivers to the TSET+ of pre-amplification circuit 311 as self-test signal, first moving contact of the first linked switch K1 is connected the second stationary contact, second moving contact connects the 4th stationary contact, and first moving contact of the second linked switch K2 connects the second stationary contact, second moving contact connects the 4th stationary contact, now self-test signal can pass through filtration module 31 successively, floating-point amplifier module 32, A/D modular converter 33, finally get back to main control unit 1, the signal received and the self-test signal sent contrast by main control unit 1, as identical, illustrate that Data Detection passage is clear and coherent, the seismic event gathered can be processed, otherwise, then can not be used for locality seismic wave.
Claims (6)
1. a wireless self-networking seismic acquisition unit,
it is characterized in thatit comprises:
As the main control unit of control center, described main control unit is connected with external wireless communication equipment by coupled wireless networking communications unit;
For the seismic wave sensors of locality seismic wave data message, the signal output part of described seismic wave sensors connects main control unit by the signal processing unit for carrying out filter amplifying processing to seismic event simulating signal;
For the power supply unit of powering, described power supply unit connects main control unit, signal processing unit respectively, and wireless networking communications unit;
Described signal processing unit comprises the filtration module for carrying out filtering process to the simulating signal gathered,
The signal output part of described filtration module connects the signal input part be used for the floating-point amplifier module that simulating signal is amplified,
The signal output part of described floating-point amplifier module connects main control unit by the A/D modular converter for simulating signal being converted to digital signal;
Described filtration module comprises the pre-amplification circuit for carrying out amplifying process to simulating signal,
The signal input part of described pre-amplification circuit connects seismic wave sensors, and its signal output part connects the signal input part being used for filtering circuit simulating signal being carried out to removal of impurities,
The signal output part of described filtering circuit connects the signal input part being used for buffering delay circuit simulating signal being carried out to buffered;
Described floating-point amplifier module comprises for carrying out amplitude judgement to simulating signal and can selecting the amplitude anticipation circuit to the multiple that simulating signal is amplified; The signal input part of described amplitude anticipation circuit receives the simulating signal of buffering time delay road output, the floating-point amplifier circuit of signal output part control linkage alterable enlargement factor; The input end of described floating-point amplifier circuit receives the simulating signal of buffering delay circuit output, and signal output part connects follow-up high-precision A/D change-over circuit.
2. wireless self-networking seismic acquisition unit according to claim 1,
it is characterized in that: it also comprises the GPS time service unit being controlled and then control main control unit energising by outer remote and run, and described GPS time service unit is located between power supply unit and main control unit.
3. wireless self-networking seismic acquisition unit according to claim 1 and 2,
it is characterized in that:
Described pre-amplification circuit comprises the reverse spike voltage protection circuit for the protection of reverse spike voltage,
The signal input part of described reverse spike voltage protection circuit connects seismic wave sensors, and its signal output part connects the amplifying circuit being used for amplifying simulating signal;
Described filtering circuit comprises the notch filter circuit that the signal after to pre-amplification circuit amplification carries out further removal of impurities; The signal input part of described notch filter circuit connects the signal output part of amplifying circuit, and its signal output part connects the signal input part being used for low-pass filter circuit simulating signal being carried out to low-pass filtering; The signal output part of described low-pass filter circuit connects the signal input part being used for circuit of high pass filter simulating signal being carried out to high-pass filtering;
Described buffering delay circuit comprises the input buffer circuit for carrying out buffered to simulating signal; The signal input part of described input buffer circuit connects the signal output part of circuit of high pass filter, and its signal output part connects the signal input part being used for time delay input buffer circuit simulating signal being carried out to delay process.
4. wireless self-networking seismic acquisition unit according to claim 3,
it is characterized in that: described pre-amplification circuit is also provided with two for carrying out the clear and coherent self-test signal input end detected to data acquisition channel, the positive pole of described self-test signal input end is connected with the main control unit of seismic event collector when carrying out self-inspection, and negative pole is ground connection when carrying out self-inspection; The selected on-off circuit that one of gating detection signal or self-test signal carry out inputting is provided with between reverse spike voltage protection circuit and amplifying circuit.
5. wireless self-networking seismic acquisition unit according to claim 4,
it is characterized in that: the signal input part of described amplitude anticipation circuit connects the signal output part of buffering delay circuit, comprises the main control unit as control center, is provided with A/D translation function in described main control unit, and be provided with the reference value of at least two digital signals;
Described floating-point amplifier circuit comprise to signal do not do to amplify change without amplifying circuit, and at least one-level amplifying circuit that signal is amplified; The described signal input part without amplifying circuit and amplifying circuit is under the control of amplitude anticipation circuit, select the simulating signal that a reception seismic event device acquisition buffer delay circuit exports, under the described signal output part without amplifying circuit and amplifying circuit is connected to the control of amplitude anticipation circuit, to the signal input part carrying out the MUX of gating output without amplifying circuit and amplifying circuit; The signal output part of MUX connects follow-up high-precision A/D change-over circuit.
6. wireless self-networking seismic acquisition unit according to claim 5,
it is characterized in that: the main control unit of described amplitude anticipation circuit is the main control unit in seismic acquisition unit;
Described amplifying circuit comprises one-level amplifying circuit, second amplifying circuit, three-stage amplifier,
The signal input part of described one-level amplifying circuit receives the simulating signal of buffering delay circuit output under the control of amplitude anticipation circuit, and signal output part connects one in second amplifying circuit or MUX under the control of floating-point anticipation circuit,
One in three-stage amplifier or MUX is connected under the control that the signal output part of described second amplifying circuit is simulated in floating-point anticipation,
The signal output part of described three-stage amplifier connects MUX.
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| CN104269041B (en) * | 2014-08-29 | 2017-05-31 | 中国运载火箭技术研究院 | A kind of high code rate data acquiring and transmission system based on star topology framework |
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